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Appliance Fix Guide

Bosch Dishwasher error code

Bosch Dishwasher Error E3100

Water leak detected in the base.

Water leak detected in the base.

Updated Aug 18, 2026
informationalno_parts
Bosch dishwasher repair guide for error E3100
Error codeE3100Dishwasher

Try these first

Start here before buying a part or taking the appliance apart.

  1. 1
    Check 1

    Check for Leaks: This error indicates the safety switch has detected water in the base of the dishwasher. Carefully inspect for any signs of a leak.

  2. 2
    Check 2

    Tilt Dishwasher: Unplug the appliance and carefully tilt it forward to drain any water from the base pan.

  3. 3
    Check 3

    Inspect Float Switch: Check if the float switch is stuck or obstructed.

A quick explanation

What does E3100 mean?

Water leak detected in the base.

The answer you came for

How to fix Bosch dishwasher error E3100

Start with the safest checks and work from simple to technical.

  1. 1

    Step 1

    1. Disconnect the dishwasher from power and water supplies. Turn off the circuit breaker and shut off the water valve under the sink.

  2. 2

    Step 2

    2. Carefully pull the dishwasher out from under the counter to access the base and internal components.

  3. 3

    Step 3

    3. Remove the lower access panel and toe kick by unscrewing the retaining screws. This will expose the base of the dishwasher.

  4. 4

    Step 4

    4. Use a flashlight to inspect the base pan for any visible signs of water. Use a sponge or towel to completely dry any water found in the base. The safety switch that triggers this error is very sensitive.

  5. 5

    Step 5

    5. Inspect all hoses, the sump, the heat pump (part 00755078), and the drain pump (part 00642239) for any visible cracks, loose connections, or signs of leaking. Tighten any loose clamps and replace any damaged components.

  6. 6

    Step 6

    6. Once all visible leaks are addressed and the base is dry, reconnect the power and water supply. Run a short test cycle while monitoring the base for any new water accumulation before reinstalling the dishwasher.

Read the additional checks from the current guide

How to Fix E3100 Error (Step-by-Step) Disconnect the dishwasher from power and water supplies. Turn off the circuit breaker and shut off the water valve under the sink.Carefully pull the dishwasher out from under the counter to access the base and internal components.Remove the lower access panel and toe kick by unscrewing the retaining screws. This will expose the base of the dishwasher.Use a flashlight to inspect the base pan for any visible signs of water. Use a sponge or towel to completely dry any water found in the base. The safety switch that triggers this error is very sensitive.Inspect all hoses, the sump, the heat pump (part 00755078), and the drain pump (part 00642239) for any visible cracks, loose connections, or signs of leaking. Tighten any loose clamps and replace any damaged components.Once all visible leaks are addressed and the base is dry, reconnect the power and water supply. Run a short test cycle while monitoring the base for any new water accumulation before reinstalling the dishwasher.Turn the appliance off, wait about 2 minutes, then turn it back on. Parts Availability Note: For this Electrolux/Frigidaire error code, exact OEM part numbers can vary by model revision and serial range. We’ve listed the most likely component(s), but confirm compatibility using your full model number before ordering. If no exact SKU is shown, use this guide for diagnosis first, then verify the matching OEM part on RepairClinic or PartSelect. Recommended Parts to Check No exact official OEM part number is listed here because the correct Bosch dishwasher part can vary by complete model number. These are targeted part-category searches, not universal fit claims. Bosch dishwasher water inlet valve Common replacement category: Water inlet valve Fit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying. Confidence: MediumThis category can be relevant for fill and water-supply faults after the tap, hose, and inlet screen are checked. Search Amazon for Bosch dishwasher water inlet valve Bosch dishwasher drain pump Common replacement category: Drain pump Fit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying. Confidence: MediumThis category can be relevant for drain and standing-water symptoms after the filter, sump, and hose are checked. Search Amazon for Bosch dishwasher drain pump Bosch dishwasher circulation pump Common replacement category: Circulation pump / wash motor Fit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying. Confidence: MediumThis category can be relevant for wash, spray-arm, and circulation symptoms after filters and spray arms are checked. Search Amazon for Bosch dishwasher circulation pump Before ordering: match the part to the complete Bosch dishwasher model number on the appliance tag. Still Not Working? If the replacement part didn't fix the issue, you may have a wiring problem or main board failure.

If the code comes back

Do not keep replacing parts based only on the code. Repeat the safe checks above. If the fault remains, stop and arrange qualified service rather than ordering from the code alone.

What may be causing it?

  • Water has leaked into the base pan
  • Safety switch has been activated
  • Float switch is stuck or obstructed

These are possibilities to investigate, not proof that one part has failed.

Recommended part

Recommended part for this error code

No replacement part recommended for this code

The researched guidance for Bosch Dishwasher error E3100 points to user-action and diagnostic steps above rather than a mapped replacement part. We will not invent a part or send you to an unrelated product.

Replacement options

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Make the money decision

Repair or replace calculator

Use the age and total repair estimate to get a simple comparison. This is guidance, not a guarantee.

Safety first

Disconnect power before opening panels or touching internal parts.

When to stop
  • Stop if you see burned wiring, melted connectors, water near electrical parts, or a gas smell.
  • Do not perform live-voltage testing unless you are trained and equipped for it.
  • Use the exact model manual or service information before replacing electronic controls.

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